NASA's Mars rover Curiosity cut a wheel scuff mark into a wind-formed ripple at the "Rocknest" site to give researchers a better opportunity to examine the particle-size distribution of the material forming the ripple. The rover's right Navigation camera took this image of the scuff mark on the mission's 57th Martian day.
Navy specialists repair a weather buoy collecting data for the National Oceanic and Atmospheric Administration (NOAA) off the Atlantic coast of Africa. President Richard Nixon, a Republican, created NOAA, one of our principal resources for understanding the Earth's climate.
Elizabeth Merriam/U.S. Navy
Spectators Mario Vasquez, 40, of Redondo Beach and his son Mario Jr., 2, watch as space shuttle Endeavour, atop NASA's Shuttle Carrier Aircraft, prepares to land at Los Angeles International Airport Friday.
Ringo H.W. Chiu/AP
The Soyuz capsule lands with Commander Gennady Padalka of Russia, NASA Flight Engineer Joe Acaba and Russian Flight Engineer Sergei Revin aboard, near the town of Arkalyk, Kazakhstan. The capsule's final meter of descent is eased by braking engines.